Open Access
1992 Global solvability and hypoellipticity on the torus for a class of differential operators withvariable coefficients
Todor Gramchev, Petar Popivanov, Masafumi Yoshino
Proc. Japan Acad. Ser. A Math. Sci. 68(3): 53-57 (1992). DOI: 10.3792/pjaa.68.53
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Vol.68 • No. 3 • 1992
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